CN209913800U - Interface circuit of single-end-containing encoder and differential encoder - Google Patents
Interface circuit of single-end-containing encoder and differential encoder Download PDFInfo
- Publication number
- CN209913800U CN209913800U CN201921015782.0U CN201921015782U CN209913800U CN 209913800 U CN209913800 U CN 209913800U CN 201921015782 U CN201921015782 U CN 201921015782U CN 209913800 U CN209913800 U CN 209913800U
- Authority
- CN
- China
- Prior art keywords
- signal
- electrically connected
- input
- circuit
- encoder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Analogue/Digital Conversion (AREA)
Abstract
The utility model discloses an interface circuit of compatible single-ended encoder and differential encoder, including signal input circuit, optoelectronic coupler, filter circuit and level conversion chip, signal input circuit's output with optoelectronic coupler's input electricity is connected, optoelectronic coupler's output with filter circuit's input electricity is connected, filter circuit's output with level conversion chip's input electricity is connected; the signal input circuit comprises an encoder plug connector, a first signal input line and a second signal input line; when the input signal is a differential signal, the first jack is electrically connected with a positive signal of the differential signal, and the second jack is electrically connected with a negative signal of the differential signal; when the input signal is a single-ended signal, the first jack is in short circuit with the constant voltage, and the second jack is electrically connected with the single-ended signal.
Description
Technical Field
The utility model relates to an electronic equipment's technical field especially relates to a compatible single-ended encoder and differential encoder's interface circuit.
Background
The current encoder interface can only process single-end signals or differential signals and cannot be compatible with the single-end signals or the differential signals. When compatibility is required, peripheral conversion circuitry must be added, adding to system complexity and cost.
SUMMERY OF THE UTILITY MODEL
To the weak point that exists in the above-mentioned technique, the utility model provides a compatible single-ended encoder of low cost and differential encoder's interface circuit.
In order to achieve the above object, the present invention provides an interface circuit compatible with a single-ended encoder and a differential encoder, comprising a signal input circuit, a photoelectric coupler, a filter circuit and a level conversion chip, wherein an output end of the signal input circuit is electrically connected to an input end of the photoelectric coupler, an output end of the photoelectric coupler is electrically connected to an input end of the filter circuit, and an output end of the filter circuit is electrically connected to an input end of the level conversion chip; the signal input circuit comprises an encoder plug connector, a first signal input line and a second signal input line, the encoder plug connector comprises a first pin, a first socket electrically connected with the first pin, a second pin and a second socket electrically connected with the second pin, one end of the first signal input line is electrically connected with the first pin, one end of the second signal input line is electrically connected with the second pin, and the other end of the first signal input line and the other end of the second signal input line are respectively and electrically connected with the input end of the photoelectric coupler; when the input signal is a differential signal, the first jack is electrically connected with a positive signal of the differential signal, and the second jack is electrically connected with a negative signal of the differential signal; when the input signal is a single-ended signal, the first jack is in short circuit with the constant voltage, and the second jack is electrically connected with the single-ended signal.
The signal input circuit further comprises an anti-reverse diode D1, a voltage dividing resistor R4 and a filter capacitor C1, wherein the anti-reverse diode D1, the voltage dividing resistor R4 and the filter capacitor C1 are connected to two ends of the photoelectric coupler in parallel.
The filter circuit comprises a resistor R10 and a capacitor C6, the input end of the resistor R10 is electrically connected with the output end of the photoelectric coupler, the output end of the resistor R10 is electrically connected with the input end of the capacitor C6 and the level conversion chip, and the capacitor C6 is grounded.
The signal input circuit, the photoelectric couplers and the filter circuit comprise three groups, the input ends of the three groups of photoelectric couplers are respectively and electrically connected with the corresponding signal input circuit, the output ends of the three groups of photoelectric couplers are respectively and electrically connected with the corresponding filter circuit, and the output ends of the three groups of filter circuits are respectively and electrically connected with the level conversion chip.
The utility model has the advantages that:
compared with the prior art, the interface circuit compatible with the single-ended encoder and the differential encoder of the utility model has the advantages that by adding the encoder plug connector in the signal input circuit, when the input signal is the differential signal, the first socket is electrically connected with the positive signal of the differential signal, and the second socket is electrically connected with the negative signal of the differential signal; when the input signal is a single-ended signal, the first jack is in short circuit with the constant voltage, and the second jack is electrically connected with the single-ended signal.
Drawings
Fig. 1 is a schematic circuit diagram of the interface circuit compatible with the single-ended encoder and the differential encoder of the present invention.
Detailed Description
In order to make the present invention clearer, the present invention will be further described with reference to the accompanying drawings.
Referring to fig. 1, the utility model relates to an interface circuit of compatible single-ended encoder and differential encoder, including signal input circuit, optoelectronic coupler, filter circuit and level conversion chip UL1, the output of signal input circuit is connected with optoelectronic coupler's input electricity, and optoelectronic coupler's output is connected with filter circuit's input electricity, and filter circuit's output is connected with level conversion chip UL 1's input electricity; the signal input circuit comprises a coder plug connector, a first signal input line and a second signal input line, the coder plug connector comprises a first pin, a first socket electrically connected with the first pin, a second pin and a second socket electrically connected with the second pin, one end of the first signal input line is electrically connected with the first pin, one end of the second signal input line is electrically connected with the second pin, and the other end of the first signal input line and the other end of the second signal input line are respectively electrically connected with the input end of the photoelectric coupler; when the input signal is a differential signal, the first jack is electrically connected with a positive signal of the differential signal, and the second jack is electrically connected with a negative signal of the differential signal; when the input signal is a single-ended signal, the first jack is in short circuit with the constant voltage, and the second jack is electrically connected with the single-ended signal.
Compared with the prior art, the interface circuit compatible with the single-ended encoder and the differential encoder of the utility model has the advantages that by adding the encoder plug connector in the signal input circuit, when the input signal is the differential signal, the first socket is electrically connected with the positive signal of the differential signal, and the second socket is electrically connected with the negative signal of the differential signal; when the input signal is a single-ended signal, the first jack is in short circuit with the constant voltage, and the second jack is electrically connected with the single-ended signal. Therefore, the single-ended signal and the differential signal can be compatible in the same interface circuit.
Specifically, the input signals are an a signal, a B signal and a Z signal, and the encoder CN1 is provided with a pin 1 connected with an a +/E5V voltage stabilization signal, a pin 2 connected with the a signal, a pin 3 connected with a B +/E5V voltage stabilization signal, a pin 4 connected with the B signal, a pin 5 connected with a Z +/E5V voltage stabilization signal, a pin 6 connected with the Z signal, a pin 7 connected with the E5V voltage stabilization signal, and a pin 8 connected with the ground EGND.
Taking signal processing a as an example:
in this embodiment, the signal input circuit further includes a reverse diode D1, a voltage dividing resistor R4, and a filter capacitor C1, and the reverse diode D1, the voltage dividing resistor R4, and the filter capacitor C1 are coupled to two ends of the optical coupler.
In this embodiment, the filter circuit includes a resistor R10 and a capacitor C6, an input terminal of the resistor R10 is electrically connected to an output terminal of the photocoupler, an output terminal of the resistor R10 is electrically connected to an input terminal of the capacitor C6 and the level shift chip UL1, and the capacitor C6 is grounded.
When the encoder is a differential signal, the A + signal is connected with the socket corresponding to the pin 1, and the A-signal is connected with the socket corresponding to the pin 2 and is processed into a single-ended signal through optical coupling isolation.
When the encoder is a single-ended signal, the pin 1 is short-circuited to the E5V, and the encoder A signal is connected with the socket corresponding to the pin 2 and is processed into the single-ended signal through optical coupling isolation.
As shown in fig. 1, the input signals also include a B signal and a Z signal. The B signal comprises a B + signal and a B-signal, and the signal input circuit comprises a diode D2, a resistor R5 and a capacitor C2; the photoelectric coupler is P2; the filter circuit of the B signal comprises a resistor R11, a resistor R8, a capacitor C5 and a capacitor C7, and the electrical connection relationship of the electronic components is consistent with that of the A signal.
The Z signal comprises Z + and Z-signals, and the signal input circuit comprises a diode D3, a resistor R6 and a capacitor C3; the photoelectric coupler is P3; the filter circuit of the Z signal comprises a resistor R9, a resistor R12, a capacitor C8 and a capacitor C9, and the electrical connection relationship of the electronic components is consistent with that in the A signal.
In this embodiment, the signal input circuit, the photocouplers and the filter circuits respectively include three groups, the input ends of the three groups of photocouplers are electrically connected to the corresponding signal input circuit, the output ends of the three groups of photocouplers are electrically connected to the corresponding filter circuits, and the output ends of the three groups of filter circuits are electrically connected to the level conversion chip UL 1.
The above disclosure is only for the specific embodiments of the present invention, but the present invention is not limited thereto, and any changes that can be made by those skilled in the art should fall within the protection scope of the present invention.
Claims (4)
1. An interface circuit compatible with a single-ended encoder and a differential encoder is characterized by comprising a signal input circuit, a photoelectric coupler, a filter circuit and a level conversion chip, wherein the output end of the signal input circuit is electrically connected with the input end of the photoelectric coupler, the output end of the photoelectric coupler is electrically connected with the input end of the filter circuit, and the output end of the filter circuit is electrically connected with the input end of the level conversion chip; the signal input circuit comprises an encoder plug connector, a first signal input line and a second signal input line, the encoder plug connector comprises a first pin, a first socket electrically connected with the first pin, a second pin and a second socket electrically connected with the second pin, one end of the first signal input line is electrically connected with the first pin, one end of the second signal input line is electrically connected with the second pin, and the other end of the first signal input line and the other end of the second signal input line are respectively and electrically connected with the input end of the photoelectric coupler; when the input signal is a differential signal, the first jack is electrically connected with a positive signal of the differential signal, and the second jack is electrically connected with a negative signal of the differential signal; when the input signal is a single-ended signal, the first jack is in short circuit with the constant voltage, and the second jack is electrically connected with the single-ended signal.
2. The interface circuit compatible with the single-ended encoder and the differential encoder according to claim 1, wherein the signal input circuit further comprises a reverse diode D1, a voltage dividing resistor R4 and a filter capacitor C1, and the reverse diode D1, the voltage dividing resistor R4 and the filter capacitor C1 are connected in parallel to two ends of the photocoupler.
3. The interface circuit according to claim 2, wherein the filter circuit comprises a resistor R10 and a capacitor C6, an input terminal of the resistor R10 is electrically connected to the output terminal of the photocoupler, an output terminal of the resistor R10 is electrically connected to the input terminal of the capacitor C6 and the level shifter chip, and the capacitor C6 is grounded.
4. The interface circuit according to claim 1, wherein the signal input circuit, the photo-couplers and the filter circuits comprise three sets, the input terminals of the three sets of photo-couplers are electrically connected to the corresponding signal input circuit, the output terminals of the three sets of photo-couplers are electrically connected to the corresponding filter circuits, and the output terminals of the three sets of filter circuits are electrically connected to the level conversion chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921015782.0U CN209913800U (en) | 2019-07-02 | 2019-07-02 | Interface circuit of single-end-containing encoder and differential encoder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921015782.0U CN209913800U (en) | 2019-07-02 | 2019-07-02 | Interface circuit of single-end-containing encoder and differential encoder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209913800U true CN209913800U (en) | 2020-01-07 |
Family
ID=69050658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921015782.0U Active CN209913800U (en) | 2019-07-02 | 2019-07-02 | Interface circuit of single-end-containing encoder and differential encoder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209913800U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111491113A (en) * | 2020-03-27 | 2020-08-04 | 浙江大华技术股份有限公司 | Hard disk video recorder, video signal access method and computer equipment |
-
2019
- 2019-07-02 CN CN201921015782.0U patent/CN209913800U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111491113A (en) * | 2020-03-27 | 2020-08-04 | 浙江大华技术股份有限公司 | Hard disk video recorder, video signal access method and computer equipment |
| CN111491113B (en) * | 2020-03-27 | 2022-10-21 | 浙江大华技术股份有限公司 | Hard disk video recorder, video signal access method and computer equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN209913800U (en) | Interface circuit of single-end-containing encoder and differential encoder | |
| CN102855211A (en) | Universal serial bus-balanced voltage digital interface converter | |
| CN103118143B (en) | Multiplex circuit of serial interface and Ethernet interface | |
| CN210324194U (en) | Communication interface magnetic coupling isolation protection circuit | |
| CN205829631U (en) | A kind of union joint for optical cable transmission and active optical cable transmission system | |
| CN214314671U (en) | Charging equipment and charging system | |
| CN106100128B (en) | Monitoring device is isolated in active power distribution network intelligent terminal accumulator | |
| CN211088666U (en) | Y-shaped data line and connecting end | |
| CN205029138U (en) | Miniature high speed connector subassembly | |
| CN212850497U (en) | Impedance matching circuit of medium-voltage communication equipment | |
| CN210075195U (en) | Digital signal isolation transmission circuit based on capacitor and forward buffer | |
| CN214315443U (en) | HDMI photoelectric hybrid transmission system | |
| CN104348470A (en) | Transmission circuit for Ethernet | |
| CN210269942U (en) | Anti-interference Ethernet drive circuit for ammeter | |
| CN202795355U (en) | Universal serial bus (USB)-balanced voltage digital interface converter | |
| CN216390507U (en) | Reverse connection preventing circuit | |
| CN214380932U (en) | Wired communication circuit and wired communication system | |
| CN218473144U (en) | High-voltage electric signal fixed conversion ratio isolation differential output circuit | |
| CN209200301U (en) | USB data line | |
| CN213342157U (en) | Circuit for realizing different-level chip signal interconnection by using operational amplifier | |
| CN209767543U (en) | Optical fiber electric signal acquisition circuit | |
| CN219351705U (en) | Signal conversion circuit | |
| CN111108654A (en) | Data line | |
| CN210246751U (en) | Non-contact electric connector and electronic equipment | |
| CN217848951U (en) | A isolating circuit for control of colliery power portion |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |